Apparatus for the treatment of paper-stock.



W. G. FISKE.

APPARATUS FOR THE TREATMENT 0F PAPER STOCK.

APPLICATION FILED FEB.24. |917.

Patented July 30, 1918 2 SHEETS-SHEET'T.

W. G. FISKE.

APPARATUS PoR THE TREATMENT 0F PAPER sTocK. APPLICATION FILED FEB.24. |917.

1 ,273,84 1. Patented July 30, 1918.

MTA/5555: /MVEA/Tw? www MNM sTATEs PATENT AorarioE.

lWILEIAM eEANTFIsxE, lor, PURELEET, ENGLAND.

APPARATUS Foa THE TREATMENT oEPAPEa-sToox.

Specification of Letters Patent.

Application led February 24, 1917. Serial No. 150,845.

GRANT This invention relates to improvements in, and in apparatus for, the treatment of paper stock such as waste paper, wood pulp, and similar materials whlch requireto be soaked and at least partially disintegrated as a preliminary stage in their manufacture o1l re-manufacture into paper, cardboard, and the like; the object of the invention being to facilitate the operation and reduce its cost, by enabling the treatment to be carried on continuously and with a considerably less expenditure. of mechanical power than heretofore. According to the material to be treate is fed along with a limited quantity of Water (or other suitable liquid) ina stream, referably continuous, toa confined channe wherein the mixture of solid and liquid is caused to follow, on its way to the point of discharge, a-course of such length as to afford time for thorough soaking of the permeable portions of the material, said channel -receivin motion of such character as to impart to te material a tumbling movement adapted, in cooperation with the soaking process, to bring about disintegration and partial reduction to a pulpy consistency of all but the morev portions of the material, withoutresistant the necesslty of employing positively-actin mechanical devices .for tearlngthe materia asunder. In addition, those portions of the material which yield less readily to the disintegrative process are automatically ,re-

tained within the channel or 'even returned,

to an earlier point in its course, until either sufficiently soaked and disintegrated or (it may be) finally rejected.

The quantity of water (or other liquid) employed should be limited to what is required for effecting such thoroughsoaking of the material as is necessary in render the masses of material capable o f easy disintegration and reduction to a consistency, it being undesirable to associate with the solid matter such an excess of liquid as would require subsequent concentration in order to prevent loss of the fibrous of the United States of' .eration ofsoa Vvposite direction so as to t1es which bec resent invention the lbac-k. Hence the apparatus order topulpy from the feed en particles or other valuable substances held in suspension within the liquid.

It is to be observed the present invention is ess, but rather anot a was ing procprocess -of dlg'estion; that Patented July 30, 1918.

that the process ofis to say, the process does not aim at efectv mg separation vbetween the bulk of the material and any impurities therein, inasmuch as practically all the solid material which is subjected to tained and used,

along with eater art of the liquid em gr poployed in effecting the ing andA disintegration. Hence the method of treatment isdistinct from any continuous process of washing heretofore proposed for the treatment of paper-making or other the solid matter is caused to travel in one direction and the washing Water in the opcarr 'olf the impurime separa' from the valuable solids.

materials, wherein treatment is reqlqired to be ret e The apparatus employed for carrying out the present invention is of. what may be termed the rotary helix type with bales or buckets, comprising a rotar .horizontal drum havin ll inner perip ery so that solid material fed into the drum at one end will, by the revolution of the drum, be caused to travel to the an open helical c annel .on its opposite end, whereat it is discharged; the helical channel being'spanned at intervals by baiies adapted to arrest the material and carry it around toward theuppe'r side of the drum whence it is allowed to fall bears a general resemblance the same type which has been proposed for Y use in the operation of continuously washwhich Ijemploy to apparatus of also made for facilitating the regulation of the quantity of liquid associated with the solid matter under treatment.

. In the accompanying drawings, which illustrate one form of apparatus for carrying out the invention, Figure 1 is a side elevation and Fig. 2 an axial vertical section of the apparatus; Fi 3 is an elevation viewed of the drum; Fig. 4 is a cross section at a point toward the middle of the length of the drum, viewed in the same direction as Fig. 3; and Fig 5 is a similar cross section near the outlet end of the drum, showing different vorms of c atie/S.

11 is the hollow drum, which is cylindrical in form with its longitudinal axis horizontal, the inlet end of the drum ybeing closed by a diaphragm 12 while the outlet end 13 is open and has a flaring'lip 14. The diaphragm 12 lhas a central circular `opening through which the material to be treated is fed, along with liquid, to the 'drum by 1-5.

means of a chute .L5 surmounted by a hopper 16. The drum is supported so as to be capable of revolving upon pairs 17, 18 .of rollers peripherally grooved to engage circumferential ribs 19, 20 on the exterior of the drum; continuous rotary motion (in the direction of the arrows being imparted to p the drum by means of a shaft 21 carrying a channel is spanned by gates such as havev already been referred to. Several examples are illustrated in the drawings, all those shown being constituted by plates extending from side to side of the channel and from the wall of the drum througha greater or less proportion of the depth of the channel.

` The plates constituting the gates are shown as of various forms. In Fig. 2, those illustrated at 26, 27,28, 29, and 30 have serrated edges, the plates themselves being,` in successive convolutions, of progressively increasing radial depth, and the depth of the serrations also increasing progressively in successive convolutions, while the plates extend.in planes parallel to the axis of the drum in the case of the gates shown at 26, 27 and 30, but in planes oblique to sa1d axis in the case of the gates shown at 28 and 29.

The gates shown at 31, which extend to the full radial depth of the channel, have plain edges, and lie in planes parallel to the axis of the drum. The gates shown at 32, which extend the full radial depth 0f the channel,

have plain edges, but lie in planes oblique to the axis of the drum. The gates shown at 33, 34 and 35 are similar to those shown at 32 except that whereas those shown at 32 are devoid of apertures, those shown at 33 have slots extending in Ithe .direction of the width of the channel while those at 34 and 35 have slots which extend in the direction of the depth of the channel but at less distances apart in successive convolutions. In Fig. 4 the four gates illustrated extend radially of the drum throu h different distances from its wall, that s own at 36 being the full depth of the channel .while of the succeeding gates 39 is of about half that depth, 38 is somewhat deeper, and 37 is of about three-fourths the depth of the channel In Fig. 5, of the four gates illustrated,

40 and 41 are inclined tangentially with reference to the axis of the drum so as to be adapted to act more efficiently as buckets, while 42 and 43 are, curved for the same purpose.

The object of providing some of the gates, as for example those' at26, 27, 2 8, 29, and 30, with serrated edges is to promote the disintegrative operation by causing the larger masses of material to become, so to speak, combed-out in their passage over the serrations and also broken-up by falling upon the serrated edges after being lifted by the action* of otherrgates. The serrated gates also act to some extent asA strainers to retard temporarily the progress through the drum of the larger and heavier masses of material lwhile allowing the supernatant liquid to iow on continuously and carry forward with it such smaller particles of material as may have become separated from the larger masses. The apertured gates, as for example those at 33, 34 and 35are likewise designed to act as strainers whereby to detain the larger masses of material while giving passage to .the liquid and to such smaller particles of material as'are carried along therewith.

In the case of gates which are inclined obliquely with reference to the axis of the drum (as in .the exam les shown at 28, 29, and 32 to 35), the inc ination is such that the plate constituting the gate forms .toward its rear end, in conJunction with the adjacent helical flange 24, an approximatel V- shaped pocket or bucket adapted to deliver its contents rearward into the previous convolution of the channel, so as to cause the material taken up bythese'gates to be retarded in its adyan'ce lengthwise of the drum.

If desired, more than one helical Harige may be provided, in which case the channel would have the character of a doublethreaded or mutiple-threaded screw. Such an arrangement is illustrated in i-Fig. 2, wherein the channel 2 5 forms a double helix. Moreover, the inclination or advance of the helical ange, and therefore also of the channel, may if desired be non-continuous, th'e channel extendingthroughout (say) the greater part of a convolution in one plane perpendicular to the axis of revolution, and the inclined portion or portions occupyin .a relatively small part or parts of a convo ution. Furthermore, the pitch or inclination and (or) the depth of the helical flange, and therefore also of the channel, may( if deparatory treatment of the solid material, or

. a continuous soaking an esses incidental sired be increased or otherwise variedu from end to end of the drum or at any required point or points in its length.

It will be observed that whereas in apparatus designed to effect a continuous'process of washing, the solid matter and the ywater whereby it is purified are made totravel respectively in opposite directions (the quantity of water used being virtually unlim: ited), in the apparatus of the present invention all the liquid travels in the same direction as .the solid matter, and is limited vin quantity as already stated. Hence' all the liquid required may be introducedl along with the material by way of the chute 15, but in order to enable the quantity of water (or other liquid) relatively to the quantity of solid material to be su quently increased if desired, a water supply pi e 44 extends from the outlet end 13 lengt wise of the space within the drum and is provided at 45 and 46 withoutlets controlled by valves 47 and 48 the spindles of which are prolonged beyond the outlet'end 13 of the drum and furnished with suitablehand.-

Wheels 49 and 50,

It is to be understood that the drum may be of any length and diameterfand may be either cylindrical or of other shape (such as polygonal) yin cross-section.4 It may also obviously, be supportedand rotated by other means than those illustrated in the drawings.

The stream of material falling from the outlet end of the drum may be screened to effect the final separation of any lumps or masses'of solid which vhappen to passl all the gates, and such lumps or masses may if des ired be returned'to the chute by meansof a continuously-driven liucket-conveyer ior other convenient apparatus. c

The water or other liquid fed into the drum, whether at the inlet end thereof or at any intermediate point or points in its length, may and as a rule preferably would) be warm; and the liquid may consist. of or contain a solution of any'7 Substance adapted to promote the disintegration or other preto extract therefrom any constituent which it may be desirable to remove prior to 'the material being subjected to the further procto manufacture or re-manufacture.

` I claim.-

l. The method of treating paper stock by disintegrative process without the employment of positively-acting mechanical tearing devices, which consists in causing the material, along `Awith liquid, to pass in a stream throu h a -conne'd channel of such length as to a ord time for thorougli soaking of the permeable portions of the material, said channel receiving motion of such character their inner edges serrated,

terior surface of said-.druml an' the direction o astoim-A part'to the material a"tumbling movement adapted, in coperation with the soaking process, to bring about disintegration and partial reduction to a pulpy consistency of all but the more resistant portions of the material. -v

2. Aln apparatus for treating paper stock' I* comprising a rotatable drum, an inwardly open helical channel located upon the inte-v rior surface of said drum and means in said channel whereb they `material is carried along and tumb ed back.

3. An apparatus for treating paper stock Iopen helical channel located upon' the iiiteiior surface of saiddrum and baiiles vlocated in said channel at spaced intervals and having their inner edges serrated.

5. Anappafratus for treating paper stock open helical channel located upon the interior surface of said drum and baiiles located in said channel at spaced intervals and having vthe serrations increasing progressively in depth in successive baiiles.fr-

6. An apparatus for treating paper stock comprising a rotatable drum, an inwardly opcn helical channel located upon the inioo terior surface of said drum and bales of progreivel increasing radial y depth 'located in saidY channel at spaced intervals and having their inner edges serrated, the serrations increasing progressivelyin depth in successive balli An apparatus for treating paper stock comprising a rotatable drum, an inwardly Vopen helical channel located u on the iii- I s apertured bailies located in said channel at spaced in tervals.

8. VAn apparatus for treating paper stock comprising a rotatable drum, an inwardly open helical channel located upon the interior surface of said drum and balles located in said channel -at spaced intervals and provided with elon ated. apertures extending in the Width of said channel.

apparatus for treating paper stock comprising a rotatable drum, an inwardly open helical channel located upon the i11- terior surface of said drum. and baflles located in said channel at spaced intervals and each provided with a plurality of elongated apertures extending `in the direction of the depth' Vof said channel.

comprising a rotatable drum,

an mwa dly open helicalchannel located upon the im' apparatus fortreating paper stock 9o comprising a rotatable drum, an inwardly terior surface y of said drum and bailes located in said channel at spaced lntervals and each provided with a plurality ,of elongated apertures extending in the direction of the depth of said channel, the spaces between adjacent apertures in successive baffles decreasing in dimensions.

11. An apparatus for treating paper stock comprising a rotatable drum, an inwardly open helicalchannel located upon the interior surface of said drum and baliles located in said channel" at spaced intervals, said baiiies being inclined tangentially with reference to the axis of the drum.

12. An apparatus for treating paper stock comprising a rotatable drum, an lnwardly open helical channel-located upon the interior surface of said drum and balies 1o cated in saidvchannel at spaced intervals, said baiies being curved in a direction transverse to the axis of said drum.

13. An apparatus for tr `eatin, ,r paper stock comprising arotatable drum, an inwardly open helical channel located upon the interior surface of said drum and baffles located in said channel at spaced intervals, said baflies extending in planes oblique to the axis of the drum.

14. An apparatus for treating paper stock 4 comprising a rotatable drum, an inwardly 3U rated, a plurality of intermediate baliles in 35 said channel and additional baffles in said channel provided with apertures'.

15. An apparatus for treating paper stock comprising a rotatable drum,'an inwardly open helical channel located upon the in- 49,

terior surface of said drum, means whereby a supply of liquid and material may be introduced into said drum, means in said channel whereby the material is carried along and thrown back and means vwhereby J additional liquid may be introduced into sald drum at one or more intermediate points.

WILLIAM GRANT FISKL.q 

